KR19990014758A - Reinforcing bar binder - Google Patents

Abstract

By reducing the height of the twisted portion of the wire loop, the structure which enables to prevent the exposure of the wire 4 from the concrete, which causes the reinforcing steel corrosion, is simple and a lightweight reinforcing bar binder. ) And a loop forming portion (3) having a curved member (2A, 2B) with a pair of grooves provided to be openable at the distal end of the main body (1), and the main body (1) is a reinforcing bar (60). The wire supply part 5 which supplies the wire 4 to the groove part of the curved member 2A, 2B which was closed so that the crossing part of the intersection might be wrapped, and forms the loop of the wire 4, and one motor 21 Open and close the curved members 2A and 2B, form the loops, and then retract the cutters 36 for cutting the wires 4 sent to the grooves, and twist the formed loops. Pin members (3) provided in parallel with a pair of gaps for binding the reinforcing bar (60) by one wire (4) It is set as the structure provided with the drive mechanism 6 which performs the advancement and rotation of 7) one by one.

Description

Reinforcing bar binder

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable reinforcing bar binder for binding wires to intersections of rebars arranged vertically and laterally at a construction site.

DESCRIPTION OF RELATED ART Conventionally, the reinforcing bar binder shown in FIG. 29 is proposed as a thing which improves the reinforcing bar binding work in a construction site (JP-A-5-13223). The reinforcing bar binder includes a J-shaped loop forming portion 102 at the distal end of the main body 101 and a wire rail 103 at the rear portion of the main body 101, and the loop forming portion 102 has a reciprocating drive device 104. ), The wire 105 is sent out from the wire rail 103 by a pair of pinch rollers 107 driven by the motor 106. The wire 105 is connected to the loop forming portion 102 via a wire cutting portion 108 driven by a solenoid not shown in the drawing and a rod-shaped wire twist portion 110 rotated by a motor 109. Supplied. Then, the intersection of the reinforcing bars 111 is positioned in the open loop forming portion 102 and closed by retracting the loop forming portion 102 to supply the wire 105 to the loop forming portion 102. The wire loop 112 is formed, and after the wire 105 is cut by the wire cutting portion 108, the wire loop 112 is twisted at the wire twist portion 110.

Further, a wire mechanism is supplied from the wire rail to the J-shaped loop forming unit by a drive mechanism composed of a motor, various gears, various cams, clutches, rollers, and the like to form a wire loop, cut the wire, and twist the wire loop. A reinforcing bar binder is known (Japanese Pat. No. 5-3495 (Microfilm of Japanese Pat. No. 3-51329)). The reinforcing bar binder is formed so that the wire is fed to the loop forming portion, cut by a cutter provided near the J-shaped tip portion, and drawn out and twisted by the hook loop provided on the rod-shaped wire twist portion. It is.

In the case of the first reinforcing bar binder disclosed in Japanese Unexamined Patent Publication No. 5-13223, a reciprocating drive device 104, a motor 106, a solenoid and a motor 109, and four types of drive devices are used. have. Therefore, the device becomes expensive and heavy, and the efficiency of the reinforcing bar work by this device inevitably deteriorates. In addition, the above-mentioned loop is twisted by the rod-shaped twist part 110. In other words, the above described loop is twisted at one point. Therefore, only the portion close to 110 is easily twisted, and the height of the twisted portion of the loop is large. As a result, when the rebar is embedded in concrete, there is a problem that the twisted portion of the wire is exposed, and the exposed portion causes corrosion of the rebar. In addition, it is necessary to form and loop a plurality of loops with wires at the intersections of the reinforcing bars. In the case of the reinforcing bar binder, it is considered difficult to form a plurality of loops of the wires.

In the case of the second reinforcing bar binder described above, after the wire loop is formed, the wire is cut in the vicinity of the distal end portion of the J-shaped loop forming portion that is considerably separated from the loop twist portion. Therefore, according to the example described in the microfilm of Japanese Patent Application No. 3-51329, at least about three quarters of the wire loop protrudes from the twisted portion of the wire to become a useless portion.

In the case of this reinforcing bar binder, the wire loop by the rod-shaped loop twisting part is twisted in one point similarly to the above-mentioned first reinforcing bar binder. Therefore, as described above, the height of the twisted portion of the wire loop becomes high, and since the useless portion described above extends further over this twisted portion, the wire is exposed from the concrete, resulting in corrosion of the rebar. There is a problem.

In addition, various mechanical elements such as a motor, various gears, various cams, clutches and rollers are used for the drive device in the reinforcing bar binder, and the structure thereof is very complicated.

The present invention has been made to solve such a conventional problem, and by reducing the height of the twisted portion of the wire loop, it is possible to prevent the exposure of the wire from the concrete causing the corrosion of the reinforcing bar, The structure is simple, and it is intended to provide a lightweight reinforcing bar binder.

1 is a plan view showing a first state of a reinforcing bar binder according to the present invention.

FIG. 2 is a cross-sectional view taken along the line II-II of FIG. 1.

3 is a cross-sectional view taken along line III-III in FIG. 2.

4 is a perspective view showing an example of the fixing guide member shown in FIG.

5 is a perspective view showing another example of the fixing guide member shown in FIG.

Fig. 6 is a partial cross-sectional view showing an example of the engaged state of the first annular member and the first pole member.

7 is a partial cross-sectional view showing an example of a coupled state of the second annular member and the second pole member.

8 is a cross-sectional view at the same position as in FIG. 2, showing a second state of the reinforcing bar binder according to the present invention.

9 is a cross-sectional view at the same position as in FIG. 3, showing a second state of the reinforcing bar binder according to the present invention.

10 is a left side view of the reinforcing bar binder according to the present invention in a second state.

FIG. 11 is a cross-sectional view at the same position as in FIG. 2 showing a third state of the reinforcing bar binder according to the present invention. FIG.

It is a fragmentary sectional view which shows the principal part of the wire delivery mechanism of the reinforcing bar binder shown in FIG.

FIG. 13 is a partial cross-sectional view showing a state of the wire feeding mechanism shown in FIG. 12, seen from the front, by omitting the wall portion of the main body appropriately. FIG.

FIG. 14 is a cross-sectional view at the same position as in FIG. 2, showing a fourth and fifth state of the reinforcing bar binder according to the present invention.

FIG. 15 is a cross-sectional view at the same position as in FIG. 3, showing fourth and fifth states of the reinforcing bar binder according to the present invention.

Fig. 16 is a partial cross-sectional view showing a second male screw member, a second annular portion, a head portion, and an adjacent portion thereof in a second state of a reinforcing bar binder according to the present invention.

It is a partial sectional view which shows the 2nd external thread member, the 2nd annular part, the head part, and its adjacent part in the 3rd and 4th state of the reinforcing bar binder which concerns on this invention.

18 is a partial cross-sectional view along the line VII-VII in FIG. 16.

19 is a partial cross-sectional view showing another state in the same position as in FIG. 18.

It is a figure which shows the head part of the reinforcing bar binder shown in FIG.

FIG. 21 is a cross-sectional view taken along the line VI-XI of FIG. 20. FIG.

It is a figure which looked at the head part shown in FIG. 20 from the side.

FIG. 23 is a view of the head portion shown in FIG. 20 seen from above. FIG.

24 is a view of the head shown in FIG. 20 as viewed from below.

FIG. 25 is a perspective view showing an outline of a state before the start of twisting of the wire loop by the pin member protruding from the head portion shown in FIG. 20.

It is a perspective view which shows the outline of the intermediate state of the twist of the wire loop by the pin member which protruded from the head part shown in FIG.

It is a perspective view which shows the outline of the state at the time of completion of pooling of the wire loop by the pin member which protruded from the head part shown in FIG.

FIG. 28 is a perspective view showing a wire loop twisted by a pin member protruding from the head portion shown in FIG. 20.

29 is a cross-sectional view showing a conventional reinforcing bar binder.

In order to solve the above problems, the first invention consists of a loop forming portion having a main body and a pair of grooved curved members provided to be openable at a distal end of the main body, wherein the main body wraps the intersection of the reinforcing bars. A wire supply unit for supplying a wire to the grooves of the pair of curved members in a closed state so as to form a wire loop, opening and closing of the pair of curved members by a single motor, and forming the loop. Thereafter, twisting and retraction of the cutter cutting the wires sent out to the groove portion and twisting the above-described loops are formed. It was set as the structure provided with the drive mechanism to make.

The second aspect of the present invention provides a first male screw member in which the pair of curved members are formed to be interlockable by a link mechanism, and the driving mechanism is driven and rotated by the motor, and the first male screw member. And a second male screw member which is disposed in parallel with the first male screw member and is driven and rotated by the motor through the first male screw member, and a female screw member which is engaged with the first male screw member, and which is relative to the female screw member. When the first male screw portion rotates forward, the first male screw portion moves toward the rear, which is far from the loop forming portion, and has a plurality of protrusions extending in the axial direction on the outer circumferential portion thereof. Coupled to the link mechanism, closing the curved member by moving toward the rear, and moving forward toward the loop forming portion. A first annular portion for opening the expiration dated curved member and a female screw member engaged with the second male screw portion, wherein the second male screw member relative to the female screw member is rotated relative to the forward rotation of the first male screw member. In the case of rotating to the front, the outer peripheral portion is provided with a plurality of protrusions extending in the axial direction and is formed so as to be able to move forward and backward integrally with the cutter and the pin member, A second annular portion which advances the cutter and moves beyond the cut position of the wire by moving forward, and protrudes the pin member to a position where the loop can be twisted; In the first state, which is the initial state before the start of the reinforcing bar binding operation by engaging and disengaging with the above-described protrusion of the first annular portion, the forward rotation of the first annular portion is performed. Restrains, allows movement in the direction along the axis, and in the second state, moves from the position in the first state, and restrains the movement in the direction of contacting the rear stopper surface or toward the rear. The first annular portion is allowed to move in the forward direction, while restraining reverse rotation and allowing forward rotation, and in the third and fourth states, and in the first and fifth states, A pair of first pawl members for maintaining a second state and the above-mentioned protrusions of the second annular portion are coupled to and separated from each other. In the first, second, and third states, the first Constrains the rotation of the bicyclic part and allows the movement in the axial direction. In the fourth and fifth states, the same direction as that of the rotation of the second male screw member caused by the forward rotation of the first male screw member. Allow the rotation of the second annular portion of the The above-mentioned which restrains rotation of this 2nd annular part of a large direction, moves from the position in said 3rd state, and restrains the movement of the direction which touched the front stopper surface, or confronted forward. A pair of second pole members configured to allow movement in a direction toward the rear of the second annular portion;

And a guide portion for sliding the cutter and the pin member, and a guide groove for guiding the wire toward an inlet portion of the loop forming portion, and rotatably with the pin member. The head portion provided is provided, wherein the first annular portion is in the forward position and the second annular portion is in the retracted position. The second and third states are set to the fourth state by forward rotation of the first male screw member, and the fifth state is performed by forward rotation of the first male screw member. Thereafter, the first male screw member was rotated in reverse to obtain a configuration in which the first male screw member was shifted to the first state.

The third aspect of the invention provides that the guide groove of the head portion includes an overhang portion projecting over the groove at the exit portion and on the forward side when the head portion rotates to twist the loop. In addition, it was set as the structure which inclines so that it may go forward by following the direction which the said wire advances.

According to a fourth aspect of the present invention, the front of the head portion includes the inlet portion of the guide groove and the following side portion of the outlet portion when the head portion rotates to twist the loop. It was set as the structure formed as an inclined surface so that a side wall might become low.

According to a fifth aspect of the present invention, the loop forming portion is inclined toward the inlet side of the groove portion of the curved member in the same direction as the bottom face of the inlet portion of the groove portion, and the front in the direction in which the wire travels is low. It was set as the structure provided with the fixing guide member which has the guide surface which forms the edge part which becomes.

According to a sixth aspect of the present invention, the curved member is provided with a groove portion having a tapered shape in the direction in which the wire travels.

According to a seventh aspect of the present invention, there is provided a first member in which the intermediate member is integrally movable with the first annular portion, and is rotatably installed relative to the first annular member, and the first member. The second member is operated by the first member in the same direction as the moving direction of the first member through the spring even when the member moves in either the forward direction or the reverse direction, and directly operates the link mechanism. It was set as the structure which consists of a member.

Eighth invention is in the plane parallel to the plane along the width direction and the longitudinal direction of the guide groove of the said head part in the exit side of the toothed gear which the said wire supply part clamps and sends out a wire. It was set as the structure provided with the guide member which formed the guide hole which inclines with respect to the said longitudinal direction of the said wire, and introduces the said wire into the said guide groove.

According to a ninth aspect of the present invention, the motor is operated by a direct current power source and the rotational force is limited by setting the current to be below a preset value.

According to a first aspect of the present invention, there is provided a loop forming portion having a main body and a curved member with a pair of grooves provided on the distal end of the main body so that the main body wraps the intersection of the reinforcing bars. After the wire supply part for sending a wire to the groove of the pair of curved members in a closed state to form a wire loop, opening and closing of the pair of curved members by one motor, and forming the loop, Retraction of the cutter which cuts the wire sent to one groove part, and the drive which twists the said loop formed, and advances and rotates the pin member provided in parallel with the pair of space which binds the reinforcement by the said wire in order. It is set as the structure provided with a mechanism.

As described above, since the drive mechanism is driven by one motor, the structure is simple, light weight, and has an effect that the workability of the reinforcing bar can be improved.

According to a second aspect of the present invention, there is provided a first male screw member in which the pair of curved members are interlocked by a link mechanism, and the driving mechanism is driven and rotated by the motor. A second male screw member disposed in parallel with the male screw member and driven and rotated by the motor through the first male screw member; and a female screw portion which is fastened to the first male screw member. When the first male screw portion rotates forward relatively, the first male screw portion moves toward the rear, which is a direction away from the loop forming portion, and has a plurality of protrusions extending in the axial direction on the outer circumferential portion, and the link is formed through the intermediate member. Coupled to the instrument, closing the curved member by moving towards the rear, and towards the front in the direction toward the loop forming portion. A first annular portion for opening the curved member by moving, and a female screw portion for fastening to the second male screw member, wherein the second male screw member is the first male screw member described above. According to the forward rotation of the motor, when it is rotated relatively, it is moved forward and provided with a plurality of protrusions extending in the axial direction on the outer circumference thereof, so that the cutter and the pin member can move forward and backward integrally, It is formed so as to be rotatable integrally, and moves forward above the cutter to move beyond the cut position of the wire by moving forward, and the pin member twists the loop. In the first state which is the initial state before the start of the reinforcing bar binding operation, The forward rotation of the first annular portion is restrained and allowed to move in the direction along the axis. In the second state, after moving from the position of the first state described above, the rear stopper surface is brought into contact with the rear side. The first annular portion constrained the movement in the direction of the heading direction is allowed to move forward, the reverse rotation is constrained, and the forward rotation is allowed, and the third, fourth states, And in the first state and the fifth state, the pair of first pole members holding the second state and the above-described protrusion of the second annular portion are separated from each other. , In the third state, restrains the rotation of the second annular portion and permits movement in the axial direction. In the above-mentioned fourth and fifth states, the above-described first rotation according to the forward rotation of the first male screw member is performed. Rotation of the second annular portion in the same direction as the rotation of the male thread member Restrains the rotation of the second annular portion in the opposite direction to this, and moves from the position in the third state, and then touches the stopper surface and restrains the movement in the direction toward the front. And a pair of second pole members configured to allow movement of the second annular portion toward the rear side, a guide portion for sliding the cutter and the pin member, and the wire as described above. A guide groove for guiding toward an inlet portion of the loop-forming portion on the front surface, having a head portion rotatably installed with the pin member, wherein the first annular portion is in a forward position, and the second annular portion By rotating the first male screw member forward from the first state in the retracted position to the second and third states, and rotating the first male screw member forward. To the fourth state, and to the fifth state by forward rotation of the first male screw member, and then to the above-mentioned first by rotating the first male screw member. It is set as the structure formed so that transfer to a state is possible.

Therefore, in addition to the above-described effects of the first invention, the twisting of the loops by applying a force in the direction of tensioning the loops to both sides by a pair of pin members results in a height of the twisted portions of the loops. Will be low. In addition, since the cutter is moved beyond the cutting position, when the head portion is rotated to twist the loop, the wire cutting portion is bent by friction between this and the inner wall around the head portion, so that the loop It can be avoided to protrude from the twisted portion of.

As a result, when the reinforcing bar is embedded in concrete, it is possible to prevent the wire from being exposed from the concrete, thereby exhibiting an effect of suppressing corrosion of the bar.

According to the third aspect of the present invention, the guide groove of the head portion includes an overhang portion protruding from the outlet portion on the forward side when the head portion rotates to twist the loop. It is set as the structure which inclines so that it may go further forward along the advancing direction of the said wire.

Therefore, in addition to the effects of the above-described inventions, the wires are prevented from deviating from the guide grooves at the time of loop formation, and the workability can be further improved.

According to a fourth aspect of the present invention, the front surface of the head portion includes the inlet portion and the exit portion of the guide groove when the head portion rotates in order to twist the loop. It is set as the structure formed in the inclined surface so that the side wall of a guide groove may become low.

Therefore, in addition to the effects according to the above-described invention, when the loop is twisted, the loop is released from the guide groove so that a smooth loop of the loop can be executed.

According to the fifth aspect of the present invention, the loop forming portion is inclined in the same direction as the bottom face of the inlet portion of the groove portion at the inlet side of the groove portion of the curved member, and the wire in the advancing direction is lowered. It is set as the structure provided with the fixing guide member which has the guide surface which forms the edge part which becomes.

Therefore, in addition to the effects of the above-described inventions, when the loop is formed, the wire easily proceeds, the loop is formed smoothly, and the force for sending the wire can be reduced, improving workability and miniaturizing the device. Exhibits the effect of being possible.

According to a sixth aspect of the present invention, the curved member is provided with a groove having a tapered shape along the direction in which the wire travels.

Therefore, in addition to the effects of the above-described inventions, it is possible to reliably introduce a wire into the groove in the front when forming the loop, thereby achieving the effect of increasing the reliability of the loop formation.

According to the seventh invention, the intermediate member is provided with a first member which is movable integrally with the first annular portion, and which is provided so as to be relatively rotatable with the first annular portion, Even when the first member moves in either the forward direction or the reverse direction, the second member is operated by the first member in the same direction as the moving direction of the first member via the spring, and directly operates the link mechanism. It is set as the structure which consists of members.

Therefore, in addition to the effects of the above-described inventions, when the curved member is closed, even if a hand is caught in the curved member by, for example, an operator's mistake, the spring functions as an elastic material, thereby preventing injury. In addition, even if the rebar is caught in the curved member, the spring to function as an elastic material, to prevent the overloading of the drive unit such as the motor. In addition, since the spring is provided, even when the curved member is closed, there is a margin to operate in the direction in which the curved member is opened slightly, and when the wire proceeds in the groove of the curved member, A gap is generated between and assists the formation of the above-described loops, and further contributes to improvement of workability and miniaturization of the driving unit. In addition, even when the curved member is opened, even if the curved member touches an obstacle such as a rebar and the opening operation of the curved member is interrupted, the cutter and the pin member are operated to return to the initial state, and after the obstacle is removed, the curved member is also It can be opened and exhibits the effect of not overloading a motor etc. as mentioned above.

Further, according to the eighth invention, the wire supply section is parallel to a plane extending along the width direction and the longitudinal direction of the guide groove of the head portion at the outlet side of the gear with a pair of grooves through which the wire is fitted. The guide member provided with the guide hole which inclines with respect to the said longitudinal direction in a plane and introduces the said wire into the said guide groove is comprised.

Therefore, in addition to the effects of the above-described inventions, the above-described effects of smoothing the formation of the loops are exerted.

Moreover, according to the ninth invention, the above-described motor is configured such that the rotational force is limited so that the current becomes less than or equal to a preset value.

Therefore, in addition to the effects of the above-described inventions, it is possible to prevent the rotational force generated by the motor from becoming excessive and to prevent the loops from being excessively twisted and to make the degree of twisting constant. It shows the effect that it becomes possible.

Next, an embodiment of the present invention will be described with reference to the drawings.

1 to 3 show a reinforcing bar binder according to the present invention, which includes a main body 1 and a curved member 2A, 2B having a pair of grooves provided to be opened and closed at a distal end of the main body 1. It consists of a loop forming portion (3).

The main body 1 includes a wire supply section 5 for supplying the wire 4 to the loop forming section 3 and the cutting of the wire 4, opening and closing of the curved member, twisting of the wire loop, and the like as described later. A drive mechanism 6 is provided. Moreover, the front part of the main body 1, ie, the left end part in FIG. 2, the protrusion part 7 is provided in the both sides of the curved members 2A, 2B, and four places, and is located in the rear part of the main body 1 The handle 8 is formed. This protrusion 7 functions to position the intersection of the reinforcing bars at the center of the twist, and also prevents the curved members 2A and 2B from coming into contact with the reinforcing bars or other objects and damaging them.

The wire supply part 5 is a pair driven by the wire rail 11 in which the wire 4 is wound, the guide rollers 12 and 13 with grooves provided to rotate, and the first motor 14. The wire delivery section 16 having the grooved teeth 15A, 15B, and the guide hole 17 for inclining and guiding the wire 4, and the fixed annular guide member 18. )

In addition, in this specification, a motor or a combination of a motor and a reducer is represented by a motor.

The drive mechanism 6 includes a second motor 21, a first male screw member 22, a second male screw member 23, a first annular portion 24, a second annular portion 25, and a pair of first 1 pole member 26A, 26B, a pair of 2nd pole member 27A, 27B, and the head part 28 are hold | maintained. The first male screw member 22 is driven by the second motor 21 to enable forward and reverse rotation. The second male screw member 23 is disposed in parallel with the first male screw member 22, is coupled via the reducer 29, and is rotatable with the first male screw member 22 in the same direction. .

The first annular portion 24 includes a female screw portion that is fastened to the first male screw member 22, and when the first male screw member 22 rotates forward with respect to the female screw portion, the right side in FIG. And a plurality of protrusions 30 extending in the axial direction at the same time as moving backwards. In addition, the first annular portion 24 is a plate that moves in the axial direction together with the first annular portion 24 without being rotated even if the first male screw member 22 and the first annular portion 24 rotate. 31) is installed through a suitable bearing. Moreover, the rod member 32 is provided in parallel with the first and second male screw members 22 and 23 and penetrates the plate 31, and is provided on both sides of this plate 31. The rod member 32 is moved in the axial direction by the plate 31 via the coil springs 33 and 34.

The second annular portion 25 is provided with a female thread portion 43 (see FIGS. 16 and 17: described later) fastened to the second male thread member 23, and with respect to the female thread portion 43, a second male thread member When 23 rotates relatively forward, it is provided so that I can move to the left side, ie forward direction in FIG. Further, a plurality of protrusions 35A and 35B extending along the axial direction are provided on the outer circumferential portion of the second annular portion 25. In addition, one cutter 36 and two pin members 37 protrude from the front end face of the second annular portion 25.

The first pole members 26A, 26B are arranged to engage the protrusions 30 of the first male threaded member 22 at different positions, and the springs are arranged so that the tip end always presses the first pole members 26A, 26B. Being pressed by. The second pole members 27A and 27B are also arranged to engage the protrusions 35A and 35B of the second male threaded member 23 at different positions, and the tip portion always connects the first pole members 26A and 26B. It is pressed by the spring to press.

The head portion 28 has a guide groove 38 for sliding the cutter 36 and a guide hole 39 for sliding the pin member 37, and is fixed in the guide member 18 fixed above. It is inserted to be rotatable. And when the cutter 36 and the pin member 37 rotate with the 2nd annular part 25, the head part 28 also rotates together with these. Further, in the center portion of the front end face of the head portion 28, the wire 4 introduced by the guide hole 17 described above is formed in the loop forming portion 3, more specifically, the curved member 2A. Guide grooves 40 introduced into the inlet portion of the protruding are formed. In FIG. 2, the bottom of the guide groove 40 is inclined so that the lower side is located forward than the upper side, and the wire 4 is formed to be inclined in the same direction as the inlet portion described above. Moreover, the overhang part 41 which protruded on the groove | channel is provided in the exit part of the guide groove 40 and the advancing side when the head part 28 rotates in order to twist the loop of the wire 4. .

As described above, the loop forming portion 3 includes the curved members 2A and 2B, which are supported by the main body 11 so as to be rotatable by the pins 51 and 52. In addition, the curved members 2A and 2B are formed with grooves 53 and 54 having a tapered shape along the direction in which the wire 4 travels, and in the case of the example shown here, the curved members 2A When 2B is closed, the front end of the curved member 2A enters into the groove 54 of the curved member 2B. Then, a step is generated between the groove portion 53 and the groove portion 54 so that the front when the wire 4 advances becomes low.

On the other hand, the link members 55 and 56 that form the link mechanism holding the long holes are fixed to the curved members 2A and 2B, and the rod members 32 described above are interposed with the pins 57 at the long holes. Combined with. Then, as the rod member 32 moves forward, that is, to the left side in FIG. 2, the curved members 2A and 2B are opened, and the state shown in FIG. 2 is obtained. On the contrary, the curved members 2A and 2B are closed by moving the rod member 32 backward. As described above, since the coil springs 33 and 34 are interposed between the rod member 32 and the plate 31, the rod member 32 is moved with respect to the forward or rearward movement of the plate 31. Delayed several times to move. That is, the rod member 32 starts to move after the force of the spring by the coil spring 33 or the coil spring 34 increases to some extent. Therefore, even when the plate 31 moves, the curved members 2A and 2B are not immediately opened or closed, but are divided several times to be delayed to operate.

In addition, for example, when the bending member 2A, 2B is closed, when the force of the direction which opens this acts on the bending member 2A, 2B, the spring force by the coil spring 33 is a certain thing. Until the degree becomes large, the curved members 2A and 2B are operable in the opening direction. That is, the plate 31 and the curved members 2A and 2B are indirectly coupled, but the two are not firmly coupled but are coupled so that some gap can occur between them. This gap helps to advance the wire 4 smoothly.

In addition, when the coil springs 33 are not present, when the curved members 2A and 2B are closed, the long holes of the curved members 2A and 2B, the link members 55 and 56, the rod members 32, and the first If the position of the annular portion 24 or the like and the precision of the dimension are not good, it will not work smoothly. In the actual prototype, when the curved members 2A and 2B are closed, the engagement portion between the link members 55 and 56 and the rod member 32 moves 12 mm to stop, and the first annular portion 24 Move 14 mm. Therefore, when the curved members 2A and 2B are closed, the coil spring 33 is contracted by 2 mm from the initial state, thereby allowing the error of the position and dimension of each member described above.

When the coil spring 33 closes the curved members 2A and 2B, for example, when a hand is caught between both members due to an operator's mistake, the coil spring 33 acts as an elastic material. In the case where rebar or the like is sandwiched between members, the load acts on the motor or the like.

On the other hand, when the curved members 2A and 2B return from the closed state to the open state, as described later, the first annular portion 24 moves forward by the reverse rotation of the second motor 21, and the rod At the same time as the member 32 is advanced, the second annular portion 25 is retracted to retreat the cutter 36 and the pin member 37. In this case, since the coil springs 34 are provided even when the bending members 2A and 2B are disturbed by, for example, rebar, the cutters 36 and the pin members 37 are provided. Retreat is enabled.

In this case, the first annular portion 24 and the second annular portion 25 return to the initial state described later, and the curved members 2A and 2B are in a closed state or in an incompletely open state. Therefore, the coil spring 34 is in a state of being reduced from the initial state. Then, when the reinforcing bar binder is moved and separated from the reinforcing bar, the curved members 2A and 2B are opened by the force of the coil spring 34.

In addition, a fixed guide member 58 for introducing the wire 4 introduced by the guide member 25 into the groove portion 53 is provided at the inlet portion of the groove portion 53 of the curved member 2A. . The guide surface 58A of this fixed guide member 58 is inclined, and when it progresses from this guide surface 58A to the groove part 53, it forms the step | step in which the front becomes low. The above-described step formed between the step and the curved members 2A and 2B helps to advance the wire 4 more smoothly, and the fixed guide member 58 curves the wire 4 for the first time. It helps to bend with curvature larger than the curvature of member 2A.

As shown in Fig. 4, the guide surface 58A of the fixed guide member 58 is preferably formed to have a step in the width direction thereof. In this case, the wire 4 inclined and entering the plane including the guide groove 40 first proceeds to the upper left portion of the guide surface 58A as indicated by the arrow X in FIG. 4, If it becomes two wheels, it progresses to the lower right part of guide surface 58A, as shown by arrow Y. That is, the loop 4 is smoothly formed while shifting in the width direction of the guide groove 40 in order without overlapping.

In addition, as shown in FIG. 5, the guide surface 58A may be an inclined surface. Also in this case, the wire 4 advances as indicated by the arrow X on the first wheel and the arrow Y on the second wheel.

In the case of the reinforcing bar binder shown here, the loop forming portion 3 is provided with a fixed guide member 58. The fixed guide member 58 is not necessarily required, and the fixed guide member 58 Instead, the guide portion having a shape substantially the same as this may be fixed to the curved member 2A and formed to operate integrally with the curved member 2A.

In addition, each said motor of said reinforcing bar binder is operated by the battery which is not shown in the figure, for example. Therefore, DC motors are used as the first and second motors 14 and 21.

In the example shown in the drawing, the upper limit value of the current flowing through the second motor 21 is determined, and the current is formed so that no more current flows. In the case of a DC motor, the current flowing through it is proportional to the rotational force generated by the DC motor. Therefore, when the upper limit value of the current is limited, the rotation of the DC motor is stopped when the rotational force generated by the motor reaches a certain value, that is, a rotational force that does not excessively twist the loop. When the rotation of the second motor 21 is stopped, the stop of the rotation is detected by a sensor not shown in the figure, and the reverse rotation is started.

In addition, since the optimum rotational force in the case of twisting may vary depending on the diameter of the reinforcing bar, the state of the reinforcing bar binder, or the like, it is preferable to adjust the above upper limit.

Subsequently, the specifics of the structure will be described together with the operation of the reinforcing bar binder described above.

1 to 3, the reinforcing bar binder shown in FIG. 1 shows a first state which is an initial state, and the tip of the wire 4 is located at the outlet of the guide hole 17, and the first annular portion 24 is 2, the second annular portion 25 is located on the right side, and the curved members 2A and 2B are open. Further, the protrusion 30 of the first annular portion 24 and the first pole member 26A are coupled to each other, the forward rotation of the first annular portion 24 is restricted, and the protrusion of the second annular portion 25 is formed ( 35A) and 2nd pole member 27A, 27B are couple | bonded, and rotation of the 2nd annular part 25 is restrict | limited.

And in this 1st state, the loop formation part 3 is located so that the intersection part of the rebar 60 may be wrapped. In this case, as described above, it is easy to position the intersection of the reinforcement 60 at the center of the twist by the protrusion 7.

6 and 7 show details of the first and second annular portions 24 and 25 and the first pole members 26A and 26B and 27A and 27B. The first pole member 26A restricts only the forward rotation of the first annular portion 24 by engaging with the protrusion 30, and the first pole member 26B engages with the protrusion 30. Only reverse rotation of the first annular portion 24 is restricted. In addition, in FIG. 6, FIG. 7, forward rotation means the right rotation, as shown by the arrow. In the first state, the first pole member 26B and the protrusion 30 are separated from each other. In addition, the second pole member 27B restricts reverse rotation of the second annular portion 25 by engaging with the protrusion 35A or the protrusion 35B, and the second pole member 27A The forward rotation of the second annular portion 25 is regulated by engaging with the protrusion 35A. In the first state, the second pole members 27A and 27B and the protrusion 35A are engaged with each other.

In addition, the protrusion 30 and the protrusion 35B are shorter than the movement strokes of the first and second annular portions 24 and 25, while the protrusion 35A is at least the same as the movement stroke of the second annular portion 25. It has a length.

8 and 9 show a second state of the reinforcing bar binder described above. In this state, the first male screw member 22 is rotated forward by the second motor 21, and the first annular portion 24 whose forward rotation is restricted by the first pole member 26A is the rear stopper surface. Go back toward 61. Moreover, the plate 31 moves backward with the movement of the first annular portion 24 to the rear, and at the same time, the rod member 32 also moves backward with the plate 31. Then, the tip of the link members 55 and 56 coupled with the rod member 32 through the pin 57 is pulled backward, and the rod member 32 is positioned at the position where the curved members 2A and 2B are closed. Is reached, the arrival of the rod member 32 is detected by a sensor not shown in the drawing, and the second motor 21 is stopped.

Further, as a result of the first annular portion 24 being moved backward, the engagement of the first pole member 26A and the protrusion 30 is released, and the first pole member 26B and the protrusion 30 are coupled to each other. do. As a result, forward rotation of the first annular portion 24 becomes possible, but reverse rotation is regulated.

In addition, while the first male screw member 22 rotates forward, the second male screw member 23 rotates forward, and the second annular portion 25 whose forward rotation is restricted by the second pole member 27B is forward. Move towards. By moving the 2nd annular part 25 to the front, the cutter 36 and the pin member 37 also move forward.

The reducer 29 is interposed between the first male screw member 22 and the second male screw member 23, and the second male screw member 23 is decelerated than the first male screw member 22 to rotate. By doing this, when the curved members 2A and 2B are closed, they are operated together with the first male screw member 22, and the closing force is weakened, for example, the curved members 2A and 2B by mistake. Even if a worker's hands are caught between the feet, the worker is not injured. That is, the drive rotational power of the second motor 21 itself is reduced. Further, by decelerating and rotating the second male screw member 23, the rotational force at the time of rotation of the second male screw member 23 is increased, and the cutting of the wire 4 and the pin member by the cutter 36 to be described later. At the time of twisting the loop by (37), a large force is caused to appear. In addition, the second male screw member 23 is decelerated and rotated to prevent excessive movement of the cutter 36 and the pin member 37 in the forward direction.

Fig. 10 shows a reinforcing bar binder in a state where the curved members 2A and 2B are closed, and the leading end of the curved member 2A enters the inlet portion of the groove portion 54 of the curved member 2B. From the groove portion 53 of 2A to the groove portion 54 of the curved member 2B, the wire 4 is allowed to proceed smoothly.

11 shows a third state of the reinforcing bar binder described above. In this state, the pair of gears 15A and 15B engaged with each other by the first motor 14 are rotated, and the wire 4 is guided by the guide hole 17, the guide groove 40, and the fixed guide member 58. ) Is sent to the curved members 2A and 2B. Further, the wire loop 62 is formed by winding the wire 4 multiple times, for example, 2.5 times or three times along the grooves 53 and 54 of the curved members 2A and 2B. . The rotation speed of the first motor 14 is detected by a sensor not shown in the drawing, and the first motor 14 is automatically stopped by operating by a predetermined rotation speed.

As shown in FIGS. 12 and 13, the gear 15A is rotatably supported by the shaft 71 on the support plate 72, and the gear 15B is rotatably supported by the pin 73. It is rotatably supported by the mold support member 74. The shaft 71 penetrates through the support plate 72 so as to be rotatable, and is coupled via the drive shaft 75 and the material joint 76 which are rotated by the first motor 14. The gear 15A is directly driven by the first motor 14, and the gear 15B meshes with the gear 15A so as to rotate in synchronism with the gear 15A. In addition, the gears 15A and 15B are provided in the center with a groove having a V-shaped cross section, for example.

In FIG. 13, the upper end of the support member 74 is always pushed toward the tooth 15A by the coil spring 77 whose one end is supported by the inner wall portion of the main body 1. That is, the gear 15B is always pushed so as to engage with the gear 15A.

13, the cam 78 couple | bonds with the edge part of the lower part of the support member 74. As shown in FIG. This cam 78 is rotatable about the shaft 79 which penetrated the wall part of the main body 1. As shown in FIG. Moreover, the handle 80 is attached to the shaft 79 from the outer side of the main body 1 so that it may rotate integrally with this. 12 and 13 show a state in which the short diameter portion of the cam 78 is coupled to the above-described end portion of the lower portion of the support member 74 and the end portion is raised by the force of the coil spring 77. In this case, the gears 15A and 15B are held in a meshed state.

On the other hand, by rotating the handle 80 from the state shown in FIG. 12, FIG. 13, and engaging the long diameter part of the cam 78 to the said end part, the said end part is pushed down by the force of the coil spring 77, The support member 74 rotates in the direction of the left rotation in FIG. 13. As a result, the tooth 15B moves in the direction away from the tooth 15A, and the passage of the wire 4 formed by the grooves of the tooth 15A, 15B becomes wider. Thus, for example, when the wire rail 11 is exchanged and the new wire 4 is passed between the gears 15A and 15B, the gears 15A and 15B are separated by the handle 80 as described above. The wire 4 can be easily introduced between the gears 15A and 15B.

Also, when the gears 15A and 15B are dropped by the handle 80, when the gears 15A and 15B are not completely engaged, when the gears 15B are pushed against the gears 15A again, Easily engaged is not limited, so it is preferable to leave some engagement.

In addition, as shown in FIGS. 12 and 13, the wire 4 is viewed from the side and the front of the reinforcing bar binder described above so that the gears 4 smoothly enter the guide hole 17 by the gears 15A and 15B. It is sent in an inclined state.

In particular, as shown in FIG. 13, the wire 4 enters the direction inclined with respect to the guide groove 40, and the fixed guide member 58 passes through the right side in FIG. 13 of the outlet portion of the guide groove 40. Proceed to).

The overhang portion 41 is formed at the right side, and the overhang portion 41 effectively prevents the wire 4 from deviating from the guide groove 40.

14 and 15 show fourth and fifth states of the reinforcing bar binder described above. First, in the fourth state, the second male screw member 23, together with the first male screw member 22, starts forward rotation again by the second motor 21, and the first annular portion 24 is rotated. While only the forward rotation to the same position, forward rotation is restricted by the second pole member 27A, the second annular portion 25 is moved forward with the cutter 36, the pin member 37 . And the wire 4 is cut | disconnected at the exit part of the guide hole 17 by advancing the cutter 36, and the pin member 37 protrudes from the front surface of the head part 28. As shown in FIG. As described above, the second male screw member 23 is decelerated and rotated so that the force for advancing the cutter 36 when cutting the wire 4 is increased. In addition, the cutter 36 not only cuts the wire 4 but also advances it to the position where the cut portion of the wire 4 on the head portion 28 side is pushed to the front surface of the head portion 28 (see FIG. 17). ). This point is mentioned later.

When the pin member 37 protrudes on the front surface of the head portion 28 and the cutter 36 advances to the position described above, as shown in FIG. 16, the second annular portion 25 has a second male screw. All the stoppers provided with the member 23 abut against the stopper surface 81, and the forward movement is stopped. As the second male screw member 22 is decelerated and rotated, the forward speed of the pin member 37 is reduced, so that the amount of advancement is not excessive. When the second annular portion 24 is brought into contact with the stopper surface 81, the second pole member 27A and the protrusion 35A are dropped, and the second annular portion 24 is capable of forward rotation.

By the way, as shown in FIG. 16, the flange member 82 is provided in the circumference | surroundings of the front end of the male thread part of the 2nd male thread member 23. As shown in FIG.

On the other hand, the second annular portion 25 holds the space 83 into which the flange member 82 can be inserted therein, and the female screw portion 43 described above in the opening portion at the rear side of the space 83. ) And its inner diameter is smaller than the outer diameter of the flange member 82. The end face of the female screw portion 43 side of the flange member 82 is the stopper surface 81.

A rod member protrudes from the front side of the flange member 82, and the base portion 84 has a cross section of a shape in which both circular portions are cut in parallel, and the tip portion 85 has a diameter larger than that of the circle. It has this small circular cross section and is continuous from the base 84 to the tip portion 85 via the taper portion 86. On the other hand, two leaf springs 87 are arranged in parallel to the inner wall portion adjacent to the opening of the space 83 at intervals. And as shown in FIG. 16, in the 3rd state which is the position where the 2nd annular part 25 retreated, as shown in FIG. 18, the leaf spring 87 has the flat part of the both ends of the base 84. I keep pressing it by a spring force. 19 shows that when the base 84 is engaged with the leaf spring 87, only the second male screw member 23 rotates, and the leaf spring 87 is formed in the arc portion of the base 84. As shown in FIG. Press to display the enlarged state. On the other hand, as shown in FIG. 17, when the 2nd annular part 25 is advanced, the leaf spring 87 will fall apart from the base 84, and will not engage with the front-end | tip part 85 of circular cross section. Will be in a non-conforming state. These are mentioned later.

In the fifth state, following the fourth state, the second motor 21 continues the forward rotation, and in this case, the first annular portion 24 rotates forward to the same position and the second annular portion ( 25) Rotate forward to the same position. At the same time, the pin member 37 pivots simultaneously with the head portion 28, and the loop 62 is twisted.

As described above, the upper limit of the current flowing through the second motor 21 is determined, and when the rotational force by the second motor 21 reaches a predetermined value, the second motor 21 stops. When the stop of rotation of the second motor 21 is detected by a sensor not shown in the figure, the second motor 21 starts reverse rotation.

Since the reverse rotation is restricted, the second annular portion 24 starts its retreat along the second male screw member 23. When the second annular portion 24 retreats to a predetermined position, it is detected by the sensor not shown in the figure, and the reverse rotation of the second motor 21 ends. That is, the reinforcing bar binder returns to the first state described above.

20-28, it demonstrates in more detail.

FIG. 20 shows only the head portion 28 in FIG. 13, and as indicated by the dashed-dotted line, the pin member 37 is in the direction indicated by the arrow 62 in the solid line in the figure. Twisted in tension

As shown in FIG. 21, the cutter 36 cut | disconnects the wire 4, and advances until the edge part of the wire 4 of the head part 28 side is located outside the head part 28. As shown in FIG. do.

On the other hand, the front surface of the head portion 28 is guide grooves 40 when the head portion 28 rotates forward, that is, when the loop 62 is twisted, as indicated by the dotted arrows in FIG. 20. The inlet part of the inlet part and the outlet part of the outlet part are formed in the inclined surface so that the side wall of the guide groove 40 may become low toward the edge part. Specifically, the fan-shaped cross section shown by (A) and (B) in FIGS. 20-24 inclines toward the edge part of the guide groove 40 so that the depth of a groove may become small.

22 to 24 show only the head portion 28 and omit the others, and FIGS. 25 to 28 are shown for clarity of the twisting state of the loop 62. The part not directly related is omitted.

Since the following side when the overhang part 41 rotates for the twist of the loop 62 is open, when the twist starts, the loop 62 immediately comes out of the overhang part 41. In addition, as described above, since the end faces indicated by (A) and (B) of the head portion 28 are formed to be inclined, the loop 62 is released from the guide groove 40 immediately when the above-described twist is started. . In addition, as shown in FIG. 21, since the cross section of the wire 4 is extruded to the outside of the head portion 28 to perform the above twisting, the portion is twisted after the loop 62 is twisted. It does not become a state which protrudes, and it becomes possible to lower the height H (refer FIG. 28) of this twist part. That is, if the end of the wire 4 is located in the guide groove 38 of the cutter 36, the wire is moved to the inner wall of the guide member 18 when the head portion 28 rotates to twist the loop 62. The tip end portion (4) is rubbed and bent, and the state protrudes from the twisted portion of the loop 62. The cutter 36 is such that protrusion of the wire 4 does not occur.

In addition, as mentioned above, since the wire 4 is twisted in the state in which it is stretched to both sides by the pin member 37, the height H of a twist part becomes low.

As a result of the height H of the twisted portion being lowered, when the reinforcement 60 is covered with concrete, the twisted portion is not pushed out of the concrete, and there is no problem of corrosion of the steel due to the pushed out.

As described above, when the rotational force is applied to the second annular portion 25 and the loop 62 is twisted until the current flowing through the second motor 21 reaches the upper limit value, the second motor 21. ) Stops, starts reverse rotation, and returns to the first state described above. That is, the first male screw member 22 rotates in the reverse direction by the second motor 21, and the first annular portion 24 whose reverse rotation is restricted by the first pole member 26B moves forward. . By moving the first annular portion 24 to the front, the rod member 32 moves to the rear, and the curved members 2A and 2B are opened to remove the reinforcing bar binder from the reinforcing bar binding part. At the same time, the second male screw member 23 also starts reverse rotation, and the second annular portion 25 whose reverse rotation is restricted rotates from the position shown in FIG. 17 together with the cutter 36 and the pin member 37. Move backwards without doing anything.

Here, in order to prevent the twist part of the loop 62 from loosening when the twist of the loop 62 is finished and the second male screw member 23 starts reverse rotation, as shown in FIG. The number of the projections 35B is increased to make the reverse rotation angle of the second annular portion 25 as small as possible.

In addition, the second annular member 25 is retracted, and the engagement state between the protrusion 35B and the second pole member 27B is released, so that the second annular member 25 can be reversely rotated. Thereafter, the plate spring 87 and the base 84 are coupled to each other so that the second annular member 25 starts reverse rotation together with the second male screw member 22 that is rotating in reverse. The protrusion 35A and the pawl member 27B are engaged until the second annular member 25 rotates at most one, and the second annular member 25 returns to the initial rotation angle state. In the second motor 21, when the second annular member 25 arrives near the position where the engagement state of the protrusion 35B and the second pole member 27B is released, this reaches the position. One is detected by a sensor not shown in the figure, and a stop signal is output to the second motor 21 which is rotating in the reverse direction. After the stop signal is output, the second motor 21 continues to rotate in a somewhat inertia, and the leaf spring 87 and the base 84 repeat the states shown in FIGS. 18 and 19. Then stop. That is, the above-mentioned reinforcing bar binder returns to the initial state shown in FIGS.

In this manner, the reinforcing bar binder is configured to return to the first state and stop after the transition to the fifth state from the first state in turn by one push button operation.

Claims (9)

It consists of a loop forming portion 3 having a main body 1 and a curved member 2A, 2B with a pair of grooves provided to be openable and closed at a tip end of the main body 1, The main body 1 sends the wire 4 to the groove portions of the pair of curved members 2A and 2B in a state in which the main body 1 is closed to cover the intersection of the reinforcing bar 60, and the loop of the wire 4 is removed. A wire supply part 5 to be formed, The cutter 36 which cuts the wire 4 sent to the said groove part after opening / closing said pair of curved members 2A and 2B and forming said loop by one motor 21 is formed. A drive mechanism for twisting and retracting the above-described loops, and sequentially retreating and rotating the pin members 37 arranged at a pair of intervals for binding the reinforcing bars 60 by the wires 4 above. Reinforcing bar binder, characterized in that provided. The method of claim 1, The pair of curved members 2A and 2B are formed to be interlockable by a link mechanism, The drive mechanism 6 is a first male screw member 22 which is driven and rotated by the motor, A second male screw member 23 disposed in parallel with the first male screw member 22 and driven and rotated by the motor through the first male screw member 22; The loop forming portion 3 is provided with a female thread portion 43 engaged with the first male thread member 22, and the first male thread member 22 rotates forward with respect to the female thread portion 43. It moves toward the rear, which is a direction away from it, and is provided with a plurality of protrusions extending axially in the outer circumferential portion, and is coupled to the link mechanism via an intermediate member, and moved to the rear as described above. A first annular portion 24 which closes the curved members 2A and 2B and opens the curved members 2A and 2B by moving forward in the direction toward the loop forming portion 3; , The female screw part 43 which meshes with the said 2nd male screw member 23, The said 2nd male screw member 23 of the said female screw part 43 of the said 1st male screw member 22 was provided. In the case of relatively rotating according to the forward rotation, it moves forward and is provided with a plurality of protrusions extending in the axial direction on the outer circumference thereof, so that the cutter 36 and the pin member 37 can be moved forward and backward integrally. In addition, the pin member is formed to be rotatable integrally, and moves beyond the cutting position of the wire 4 by advancing the cutter 36 by moving forward. A second annular portion 25 which projects 37 to the position where the above described loop can be twisted; In the first state, which is the initial state before the start of the reinforcing bar binding operation, the first annular portion 24 is engaged with and disengaged from the above-mentioned protrusion, and the forward rotation of the first annular portion 24 is restrained. In the second state, after moving from the position in the above-described first state, the second stopper abuts against the rear stopper surface 61 and restrains the movement in the rearward direction. The first annular portion 24 allows the movement in the direction toward the front, restrains the reverse rotation, allows the forward rotation, and the third, fourth, and first states. And a pair of first pole members 26A and 26B for maintaining the second state in the fifth state. The second annular portion 25 is engaged with and detached from the protrusion, and in the first, second, and third states, the rotation of the second annular portion 25 is constrained, and the axial direction In the above-mentioned fourth and fifth states, the above-mentioned second in the same direction as the rotation of the second male screw member 23 in accordance with the forward rotation of the first male screw member 22 described above. Allows the rotation of the annular portion 25, restrains the rotation of the second annular portion 25 in the opposite direction, and moves to the stopper surface 81 after moving from the position in the third state. A pair of second pole members 27A and 27B which are in contact with each other and allow movement in the direction toward the rear of the second annular portion 25 in which movement in the direction toward the front is restrained; A guide groove for guiding the cutter 36 and the pin member 37 to slide, and guides the wire 4 toward the inlet of the loop forming portion 3. And a head portion 28 which is held in and rotatably installed with the pin member 37, By rotating the first male screw member 22 forward from the first state in which the first annular portion 24 is in the forward position and the second annular portion 25 is in the retracted position. The second and third states are set as described above, and the first male screw member 22 is rotated forward to the fourth state, and the first male screw member 22 is rotated forward. And the reinforcing bar binder is formed so as to enable the transition to the above-mentioned first state by turning the first male screw member 22 in reverse. 3. An overhang according to claim 2, wherein the guide groove of the head portion 28 protrudes over the groove at the exit side and on the forward side when the head portion 28 rotates to twist the loop. A reinforcing bar binder, characterized in that it is provided with a portion (41) and is inclined to be more forward in the advancing direction of the wire (4). The inlet part and the outlet part of the said guide groove when the said head part 28 rotates in order to twist the said loop is the front of the said head part 28. Reinforcing bar binder of the base material characterized in that the following side portion is formed in an inclined surface such that the side wall of the guide groove is lowered toward the end. The said loop forming part 3 inclines in the same direction as the bottom face of the inlet part of the said groove part, and the said wire is formed in the said inlet side of the said curved member 2A, 2B. A reinforcing bar binder, characterized by comprising a fixed guide member (58) for holding a guide surface forming an end portion of which the front in the direction (4) is lowered. 2. The reinforcing bar binder according to claim 1, wherein the curved members (2A, 2B) have grooves having a shape in which the wire (4) is tapered in the traveling direction. 3. The first member according to claim 2, wherein the intermediate member is provided so as to be integrally movable with the first annular portion 24 and to be relatively rotatable with the first annular portion 24. And the first member is operated in the same direction as the moving direction of the first member by the first member via a spring even when the first member moves in either the forward direction or the reverse direction. Reinforcing bar binder, characterized in that consisting of a second member. 5. The head portion 28 according to any one of claims 2 to 4, wherein the wire supply portion 5 is located at an outlet side of a toothed tooth with a pair of grooves for pinching and discharging the wire 4. A guide member inclined with respect to the longitudinal direction in a plane parallel to a plane extending in the width direction and the longitudinal direction of the guide groove of the guide groove to form a guide hole for introducing the wire 4 into the guide groove. Reinforcing bar binder, characterized in that provided with. 9. The reinforcing bar binder according to any one of claims 1 to 8, wherein the motor is operated by a direct current power source, and the rotational force is limited by setting the current to be below a preset value.